CN107636250A - Thread connection end for impact type drill string component - Google Patents
Thread connection end for impact type drill string component Download PDFInfo
- Publication number
- CN107636250A CN107636250A CN201680029406.XA CN201680029406A CN107636250A CN 107636250 A CN107636250 A CN 107636250A CN 201680029406 A CN201680029406 A CN 201680029406A CN 107636250 A CN107636250 A CN 107636250A
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- Prior art keywords
- screw thread
- axial
- thread
- flank
- connection according
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- 230000004323 axial length Effects 0.000 claims description 36
- 238000005553 drilling Methods 0.000 claims description 18
- 210000002445 nipple Anatomy 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 230000003247 decreasing effect Effects 0.000 claims description 4
- 238000005452 bending Methods 0.000 abstract description 11
- 238000010276 construction Methods 0.000 description 19
- 230000007704 transition Effects 0.000 description 15
- 230000005540 biological transmission Effects 0.000 description 5
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B1/00—Percussion drilling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
- E21B17/0426—Threaded with a threaded cylindrical portion, e.g. for percussion rods
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L15/00—Screw-threaded joints; Forms of screw-threads for such joints
- F16L15/06—Screw-threaded joints; Forms of screw-threads for such joints characterised by the shape of the screw-thread
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- General Engineering & Computer Science (AREA)
- Earth Drilling (AREA)
- Dowels (AREA)
- Ropes Or Cables (AREA)
Abstract
A kind of thread connection for drill string component, it has body, formed with screw thread on body.The reduction of stress concentration and resistance to bending moment are realized at the screw thread by reducing the flank of the crest of the screw thread at the depth of thread and spiral coil by fitting in least significant end or the least significant end at tooth bottom at least one axial end (300) place of the screw thread.
Description
Technical field
The present invention relates to a kind of thread connection for drill string component, and specifically, but not ad hoc, is related to it
Depth of the middle screw thread at the first and/or second end reduces to strengthen coupling and reducing the screw thread of stress concentration for bending force
The half of joint.
Background technology
Drilling for creating long drilled holes typically comprises the drill string bar of multiple elongations, and the drill string bar of the plurality of elongation is by phase
The male form end of thread that the connects and female end of thread is end-to-end is coupled together.As will be appreciated, the male form end of thread and female
The screw thread of both ends of thread is all subjected to stress concentration, and this causes the reduction of the fatigue of materials and service life of drill string component.Generally,
Especially due to connection is applied to due to the big transverse shift of drill string during drilling and potentially during preparation is withdrawn
On bending moment, stress concentration is intended to highest at an axial end or two axial ends in the axial end of screw thread.
The trial for improving nipple is described in WO 2007/133145 and WO 2008/150207.
EP 1066448 describes a kind of thread connection for impact type drilling, and wherein cylindricality external screw thread has at least one
The individual end of thread, at least one end of thread, the depth of thread reduces, to attempt to reduce the possibility of the damage to screw thread.So
And existing nipple is still susceptible to stress concentration and fatigue and influenceed and for providing better than existing construction during use
Demand be present in the intensity of raising and the thread connection of durability.
The content of the invention
It is an object of the invention to provide drill string component, the drill string component has thread connection end, to form the part of drill string,
Wherein, the union end is configured to the asymmetrical loading force that tolerance is acted on drill string, to reduce answering at threaded sections
Power and fatigue and minimize the risk of the failure of connection.Further object be to provide be configured to shoulder or bottom contact
The male form portion and/or female portion of connection, wherein, screw thread is specifically constructed to minimize the stress at the axial end of screw thread
Concentrate.
Realized by the male form and/or female union end that provide the drill string component for being suitable for shoulder or bottom contact
These purposes, wherein, at least one axial end of screw thread is adapted to, its profile with being among the end of thread in the axial direction
The main length of screw thread is different.Especially, connection of the invention includes the tapered depth of thread, with towards the end of thread screw thread week
Reduce into path.Correspondingly, the end of screw thread do not have in terms of the depth of thread it is any drastically or unexpected change.Send out
Existing this construction causes the stress concentration at the end of thread to minimize, while still provides and can be joined easily and reliably
Connect and the female end disconnected and the screw thread at male form end.Axial length and spy by the spiral coil of the least significant end that minimizes screw thread
The crest of screw thread or the axial least significant end at tooth bottom not being at least partially defined in by construction in the last spiral coil
Flank shape contour and realize the resistance for bending force.That is, according to the subject innovation, in the spiral shell that the depth of thread reduces
In the axial end portion transitional region of line, the axial length of the flank of the crest of the spiral coil of least significant end or the least significant end at tooth bottom with
The speed bigger than any change of the axial length of the neighbouring flank at the alternate sides at same crest or tooth bottom is reduced.
According to an aspect of the present invention, there is provided for the thread connection of the drill string component of drilling, including：Body, body
With the part with longitudinal axis, screw thread extends around the longitudinal axis, to form the half of nipple；Screw thread, with spiral shell
The form of volution forms screw thread by least one spine circumferential and axially extending along body, and spiral coil has corresponding
The axially spaced crest of flank and tooth bottom, and the screw thread has axially spaced first end of thread and second end of thread；Wherein,
Depth of the screw thread radially at the first and/or second end is tapered, with towards the end of screw thread in the axial direction
Reduce along the circumferential paths of screw thread；It is characterized in that：The crest of the spiral coil of axial least significant end or the axial most end at tooth bottom
The axial length of the flank at end is with the alternate axial side at crest or the tooth bottom than the spiral coil in the axial least significant end
The speed that the neighbouring flank at place is big reduces.
Correspondingly, the circumferential paths of the flank of least significant end relative to the circumferential paths of neighbouring flank towards axial least significant end
Either tooth bottom tilts or bent in the circumferential paths of screw thread the crest of spiral coil so that the axial length of the flank of least significant end
Less than the axial length of the neighbouring flank in the end transitional region of screw thread, in the end transitional region of screw thread, screw thread
Depth reduces.Transitional region at axial end (one or more) place of screw thread correspondingly includes：" transition initial point ", should " transition
Initial point " is equal to the position of the depth at the axial inner region of screw thread corresponding to the depth of screw thread (in the spiral coil of least significant end
Circumferential paths in)；" transition terminal ", it is somebody's turn to do " transition terminal " and corresponds to the position that the depth of thread is equal to, or approximately equal to zero
Put.That is, the transitional region with the depth of thread reduced circumferentially extends in a part for the spiral coil of least significant end.This construction
Be advantageous to the stress concentration that minimizes at the end of thread (one or more) place and minimize the axial direction that transitional region extends past
Distance.This has increase and the effect of the axial distance of the non-threaded regions of the axially adjacent body of threaded sections.It has been found that
The present invention is advantageous to shoulder contact construction, so as to maximize the radial direction shoulder of terminal/initial point and offer shoulder contact in screw thread
Between axially spaced distance.The effect of axially spaced shoulder and screw thread is to minimize stress and the resistance for bending moment.
" flank (flank) " is mentioned in the specification and contains composition part as axially extending rib
, in neighbouring region in the axial direction between crest and tooth bottom.Correspondingly, in each axial direction at crest and tooth bottom
Flank at side can be identical and including identical axial length, and on the axial length, screw thread is uniform.In addition
Ground, the surface at flank can limit the section of cone, so as in axially extending cross sectional planes be base by coupling
This is linear.
Alternatively, a complete helix circle 0.1 to 0.8 (substantially 30 to 290 degree and especially 36 to 288 degree) or
In the scope of person more preferably 0.2 to 0.6 (substantially 70 to 220 degree and especially 72 to 216 degree), the spiral of axial least significant end
The depth of the screw thread of circle is decreased to zero.
Alternatively, the threaded part of formation of body is substantially cylindrical.According to further alternative construction, above shape
Can be taper into threaded part.The screw thread of the present invention is corresponding to existing screw thread construction compatible.
Preferably, the axial length of neighbouring flank is substantially equal to the spiral coil between the spiral coil for being axially positioned on least significant end
Flank in any one flank axial length.It is this to be configured with beneficial to the pitch for maintaining the screw thread at the end of thread, to avoid
The problem of with connection nipple and relevant disconnection nipple.
Alternatively, screw thread is partially located in outside formation in this of body, to represent male form union end.Alternately, screw thread
It can be partially located in and be internally formed in this of body, to represent female union end.Alternatively, the subject innovation can apply to spiral shell
The both ends of line or single-end, the single-end be only axial inner ends (with the main length of shoulder or drill string component axially adjacent
Positioning) either outer end (positioned axially adjacent with one end as male form union end or female union end of drill string component).
When the subject innovation is arranged on male form connection place, body can include non-threaded shank, the depth edge of screw thread
The circumferential paths for screw thread are decreased in non-threaded shank.Alternatively, body can include annular side surface, the annular side surface
It is radially projecting from an axial end of non-threaded shank, and the side surface transverse to or basically perpendicular to longitudinal axis alignment.
This construction provides the shoulder contact construction of thread connection.Preferably, the subject innovation be arranged on screw thread, axially near
That an end portion of annular side surface, so as to maximize the axially spaced distance between the initial point of screw thread and annular side surface.
Preferably, the corresponding flank of crest wraps on the axial length of the screw thread for the spiral coil for not including axial least significant end
Include of substantially equal axial length.The flank of the crest of the spiral coil of axial least significant end or the axial least significant end at tooth bottom is correspondingly
Less than the axial length of the corresponding flank of the screw thread of the crest (between the spiral coil of least significant end extend) of axial inner.Accordingly
Ground, on the whole axial lengths for not including end transitional region (one or more) of screw thread, screw thread is substantially homogeneous.Phase
Ying Di, the subject innovation is compatible with existing the male form end or female end of traditional drill string component, and including with for being formed
The screw section of the part of the drill string component thread contour consistent with the existing standard of both tapered thread sections and construction.
Because the axial length of the flank of least significant end is reduced with the big speed of neighbour nearly flank, it is possible to thinks least significant end
The circumferential paths of flank be aligned transverse to the circumferential paths of neighbouring flank, effect is：The axial least significant end part of screw thread has been seen
To be bent axially inwards towards the axial inner region of screw thread.It is this to construct the end transitional region (one or more for avoiding screw thread
It is individual) projected axially outward from the main body of screw thread, so as to provide the threaded sections of axially compact.
Alternatively, diameter of the screw thread at the radial position of crest is equal to or more than axially to the body of the side of screw thread
Diameter.Alternately, diameter of the screw thread at the radial position of crest is equal to or less than axially to the sheet of the side of screw thread
The diameter of body.Correspondingly, screw thread is considered to erect and protrudes from main body or be recessed into body.
(the spiral ridge that the Dy mentioned in the specification corresponds on the two opposite sides in the diametric(al) of threaded sections
Portion) distance in diametric(al) between radial position at crest, to represent the maximum gauge of threaded sections.In threaded area
In the case that section is generally conical, Dy corresponds to the diametric(al) of that axial least significant end crest with maximum radius/diameter
On distance.The Ds mentioned in this specification corresponds to minimum (minimum) diameter of non-threaded shank and Dm corresponds to master
The diameter of length sections.Additionally, the Di mentioned in the specification corresponds to opposite in the diametric(al) of threaded sections
The distance in diametric(al) between the radial position of (rib) tooth bottom on both sides, to represent threaded sections most
Minor diameter.In the case where threaded sections are generally conical, Di corresponds to the axial least significant end tooth bottom with maximum radius/diameter
Diametric(al) on distance.
In the specification, the Ls that mentions corresponds to the axial inner ends and shoulder or main length sections in threaded sections
The axial length of the non-threaded shank limited between the side surface, and Lt corresponds in the threaded area that screw thread is exited between end
The axial length of section.
Preferably, Ls is less than the axial length L t of threaded sections.Alternatively, the diameter (Ds) of non-threaded shank is substantially equal to
Or the diameter (Dm) less than main length sections.Alternatively, Ds may be approximately equal to Dy.
Preferably, Ds is less than Dy.Preferably, Ds be less than on two opposite sides in the diametric(al) of threaded sections (
Between rib) distance (Di) in diametric(al) between the radial position at tooth bottom.It is further preferred that Ds may be at
In the scope of (Di subtracts Td) to (Di subtracts 4Td), wherein Td is being hung down with longitudinal axis between the radial position at crest and tooth bottom
The straight depth of thread.It is further preferred that Ds is in the scope of (Di subtracts Td) to (Di subtracts 3Td).Most preferably, Ds subtracts equal to Di
2Td.The plug of Ds constructions including being such as described in detail herein advantageously allows the annular side surface or the master of optimization and shoulder
The adjacent transitional region in the ends of length sections.Especially, Ds less than Di realize axially longer transitional region and
The bigger radius of curvature at transition part between non-threaded shank and (shoulder or main length sections) annular side surface.
Correspondingly, Ds present invention construction is minimized at the base portion of plug (in it and the connecting portion of main length or shoulder regions
(junction) place) stress concentration.Ds present invention construction combines with Ls is correspondingly conducive to provide resistance bending stress
Impact structure, and be also configured in use when the component of drill string ideally axially aligns and also when deflected
The stress caused by impact ripple is by the transmission of plug is born when (being slightly aligned transversely to one another).
Preferably, the curvature axially near the transitional region of side surface includes at least three or at least four curvature half
Footpath.Alternatively, the curvature of transitional region includes three to six or three to four radius of curvature.Preferably, in transition region
The minimum diameter (Ds) of radius at domain from (shoulder or main length) side surface towards non-threaded shank is in the axial direction
Increase.Preferably, transitional region includes three or four different radius of curvature.In R1 near side surface positioning and R4
At the minimum diameter Ds of non-threaded shank and limit at the transitional region in the case of minimum diameter Ds, alternatively,
First curvature radius R1 is about the half R1 ≈ R2/2 of second curvature radius；Alternatively, R2 is about the 3rd radius of curvature
Half R2 ≈ R3/2；Alternatively, R3 is about 1/3rd R3 ≈ R4/3 of the 4th radius of curvature.
The subject innovation is specially constructed for the threaded pin that impact type bores component.Via screw thread and non-threaded handle
Portion (as herein be described in detail as) constitution realization elongate member and male form plug is suitable for bearing by hitting in particular
Bending force and stress concentration caused by the transmission of formula impact, while any of shock wave size minimized during transmission subtracts
It is small.The thread contour of plug is suitable for percussive drilling and is preferably, and screw thread includes long along threaded sections Lt axial direction
The homogeneous diameter of degree.That is, threaded sections are preferably formed as substantially cylindrical section.So, the thread contour is significantly hard
Gu it is durable, with ripple transmission and therefore the high loading force of withstanding shocks.Especially, the subject innovation includes following screw thread, the screw thread
For boring component with increased corresponding external diameter and with the pitch length in scope 5 to 50mm.Additionally, this theme is sent out
The angle of pitch (pitch angle) of bright screw thread can for the component with corresponding pitch length and external diameter scope 5 to
In 10 °, wherein the angle of pitch is in the path of helical thread paths and between the tangent line of the longitudinal axis orthogonal of elongate member
The angle, θ of extension.Additionally, the diameter Dy (distance between thread crest) of threaded sections according to aspects of the present invention is for corresponding
Pitch length and the angle of pitch can be in scope 15 into 120mm.Correspondingly, the subject innovation can include following screw thread structure
Make, wherein, the business of pitch length/diameter of thread is in scope 0.3 to 0.6；0.35 to 0.55 and alternatively 0.4 to 0.46
In.
According to the second aspect of the invention, there is provided drill string component, including the thread connection being such as claimed herein, wherein
The component include it is following in any one：Drilling rod；Drilling pipe；Shank torquer；Drill bit.
Brief description of the drawings
Now by only by example and be described with reference to the drawings the present invention specific implementation, in the accompanying drawings：
Fig. 1 is the external perspective view of a part for drill string, and drill string includes shank adapter, and the shank adapter is via male form
Drilling rod is connected to female connecting joint via one end in the axial direction；
Fig. 2 is the perspective view according to Fig. 1 of the specific implementation of present invention shank adapter；
Fig. 3 is the perspective view at the male form end of Fig. 2 shank adapter；
Fig. 4 is the perspective view of the female union end of Fig. 1 drilling rod；
Fig. 5 is the viewgraph of cross-section by the elongation of Fig. 3 male form end of thread；
Fig. 6 is the perspective cross-sectional view by Fig. 3 male form end of thread；
Fig. 7 is another external perspective view at Fig. 3 screw thread male form end；
Fig. 8 is the external perspective view of the amplification of the axially innermost end of Fig. 7 male form threaded sections；
Fig. 9 is the male form plug (spigot) according to Fig. 8 of another specific implementation of present invention shank adapter
The external perspective view of union end.
Embodiment
Drill string component will be used as by example reference and describe the subject innovation to form the shank adapter of the part of drill string.
It will be understood that the subject innovation can be suitable for together with male form screw member axially engages with female screw member
Connecting joint shoulder contact construction or bottom contact structure drill string any elongate member.Correspondingly, this theme is sent out
It is bright to can apply to drilling rod, drilling pipe, shank, shank adapter, drill bit, axle either at the drive end of drill string or in drill string
The adapter installed at drill bit.
With reference to figure 1, drill string includes the shank adapter 100 of elongation, and the shank adapter 100 of the elongation turns via by shank
Connect device 100 the male form end of thread and drilling rod 101 the female end of thread formed thread connection (coupling) 104 and it is axially coupled
To least significant end drilling rod 101.The annular side surface that drill string component 100,101 both of which couple via the male form of wherein adapter 100
102 with " shoulder contact " that the corresponding annular side surface 103 of the female sleeve of drilling rod 101 is engaged in a manner of touching and contacting and
Connection.
With reference to figure 2, shank adapter 100 includes main length sections 202, and main length sections 202 have first end 200 and the
Two ends 201 and be configured to via the second end 201 be arranged on the drill string adjacent with jump bit drive end at.Flushing hole 206
Formed in main length sections 202, to allow to introduce irrigation fluid between flushing hole 206 and first end 200 by turning
Connect in the axially extending centre bore 205 of length thereof axially forward of device 100.Main length sections 202 are by from the footpath of male form plug 208
Terminated to prominent annular shoulder 207 towards first end 200, the outer dia of male form plug 208 is less than shoulder 207 and main length
The corresponding outer dia of section 202.Correspondingly, annular side surface 102 is arranged on the axle between plug 208 and shoulder 207
To at connecting portion, to provide the shoulder contact surface for being used for the annular side surface 103 against the connection of screw thread female.The quilt of plug 208
Axially it is divided into towards the axially extending threaded sections 204 of first end 200 and is axially positioned on threaded sections 204 and shoulder 207
Middle non-threaded shank 203.
With reference to figure 3, threaded sections 204 are in non-threaded shank 203 and the cone of the least significant end at adapter first end 200
It is axially extending between shape section 303.Threaded sections 204 include：First end of thread 301, first end of thread 301 terminate at tapered zone
At section 303；With second end of thread 300, second end of thread 300 is terminated at non-threaded shank 203.Threaded sections 204 are by single head
(single start) screw is formed, and in the screw thread, single spine 302 is followed in tapered segment 303 and non-threaded handle
The spiral path circumferentially extended between portion 203 around plug 208.With reference to figure 4, screw thread male form plug 208 is configured to be accepted
In female sleeve 404, female sleeve 404 includes being arranged on the corresponding screw thread at the surface 405 towards inside of sleeve 404
Section 400.Threaded sections 400 are axially extending between the first axial end 401 and the second axial end 402 of this hollow cylinder,
And including first end of thread 403 and the second end of thread (not shown), second end of thread is axially fixed towards the second end 402 of sleeve
Position.The present invention describes with reference to male form plug 208, but is that the present invention may be applied to covering as will be appreciated
The screw thread 400 being internally formed in cylinder 404.
With reference to figure 3 to 6, the thread ridge 302 of plug 208 may be considered that to rotate including multiple spiral coils, each corral
The central axis 304 for connecing device 100 extends 360 ° in outside on plug 208.Correspondingly, each circle, which may be considered that, is such as scheming
Include axial and circumferential initial point 601 and corresponding axial and circumferential terminal 602 as shown in 6.Each spiral coil includes
Crest 500 and corresponding tooth bottom 501, and crest 500 and tooth bottom 501 are opened by corresponding flank 502a, 502b points.Each flank
502a, 502b are axially extending between crest 500 and adjacent tooth bottom 501, are generally transverse to axis 304 and are aligned.Correspondingly, often
One flank 502a, 502b be formed each crest 500 and axle upwardly adjacent to tooth bottom 501 between provide and seamlessly transit
, it is inclined and decline curved surface 600a, 600b.
With reference to figure 5, threaded sections 204 include multiple axial inner spiral coils 505, the first axial least significant end spiral coil 503
(it is terminated at tapered segment 303) and the second least significant end spiral coil 504 (it is terminated at non-threaded shank 203).According to this
Specific implementation, shape, size and/or the construction of the spiral coil 503,504 of least significant end are different from axial inner spiral coil 505
And it is specifically constructed to mitigate caused by bending force, in the stress concentration of threaded sections 204.Specifically, with
The depth 506 of screw thread corresponding to radial distance between tooth bottom 501 and crest 500, relative in the depth most inside spin circle 505
Degree 506, reduce at the spiral coil 503,504 of each least significant end.With reference to figure 7, the spiral coil 504 of the least significant end of axial inner
Including generally by the transitional region shown in reference 700, in the transitional region, the depth of thread 506 of spine 302 is from axle
Internally the level of spiral coil 505 is reduced to zero.According to the specific implementation, transitional region 700 is such as in the beginning of spiral coil
Distance in the scope of 0.2 to 0.3 (90 degree) of the complete helix circle limited between point 601 and the terminal 602 of spiral coil
Upper circumferentially extending.Transitional region 700 is limited by transition initial point 802 and transition terminal 803 are circumferential.Region 700 is axially confined, from
And contain near the flank 502c of the axial least significant end of the non-threaded axially position of shank 203 and near axial inner spiral
Enclose the axial direction most flank 502d of 505 axially positions.Correspondingly, the axial direction between axially proximate tooth bottom 501 of transitional region 700
Extension.
With reference to figure 8, the depth of thread 506 reduces from transition initial point 802 to transition terminal 803, simultaneously (as axially proximate
Limited between crest 500) pitch of screw thread be maintained on whole axial lengths of threaded sections 204 it is constant.Begin in transition
The depth of thread at point 802 is substantially equal to the depth of thread 506 at axial inner spiral coil 505 and in transition terminal 803
The depth of thread 506 at place is zero (or substantially zero).The spiral coil 504 of axial least significant end in transitional region 700 includes
By the crest 500 of two asymmetrical flank 502c, 502d borders at each axial side.Especially, internal flank 502d
Axial length 801 be generally higher than least significant end flank 502c corresponding axial length 800, and this relative different is in initial point
Extend in whole circumferential lengths of transitional region 700 between 802 and terminal 803.Specifically, the flank 502c of least significant end week
Tilt or bend in the circumferential paths of screw thread to path towards crest 500 so that as the depth of thread is from transition initial point 802
Reduced to transition terminal 803, the flank 502c of least significant end axial length 800 is with the speed bigger than internal flank 502d speed
Reduce.Correspondingly, internally flank 502c most interior axial side creates region 804, and the outer dia in the region 804 is substantially equal to
The outer dia of non-threaded shank 203.In this way it can be considered that as the screw thread at end 300 is due to the flank of least significant end
The change of 502c shape contour and orientation and be truncated (truncated), non-threaded shank 203 axially extends to threaded sections
In 204.According to the specific implementation, in the centre of transitional region 700, circumferential point is (between initial point 802 and terminal 803
Point) place flank 502c axial length be internal flank 502d corresponding axial length substantially 0.4 to 0.7.Correspondingly,
The flank 502c of the axial least significant end of the spiral coil 504 of least significant end circumferential paths are not parallel to or transverse to right below
It is accurate：I) circumferential paths and ii of the inside flank 502d in transitional region 700) axial inner spiral coil 505 corresponding tooth
Side 502a, 502b.
Another specific implementation of male form plug 208 is detailed with reference to figure 9.Fig. 9 and shown referring to figs. 1 to 8 and
The embodiment difference of description is that non-threaded shank 203 includes connecting in the axial direction between side 102 and the end of thread 300
The shape contour of continuous bending.However, the construction of the threaded sections 204 described below according to Fig. 9 embodiment can also apply to
Fig. 1 to 8 embodiment.
With reference to figure 9 and in order to optimize the intensity of plug 208 to resist the bending being subjected to by drill string during percussive drilling
Power, business Ls/Dy are 0.5 to 0.7 in 0.4 to 1.0 scope and according to the specific implementation, and wherein Ls corresponds in spiral shell
The axial length of the non-threaded shank 203 limited between the axial inner ends of line section 300 and side surface 102；And Dy corresponds to
In diametric(al) between the radial position of crest 500 on two opposite sides in the diametric(al) of threaded sections 204 away from
From.Additionally and as being described in detail herein, Lt corresponds to the axial length of threaded sections 204, and Di corresponds in spiral shell
The radial position at the tooth bottom 501 (between each rib) on the two opposite sides in the diametric(al) of line section 204 it
Between diametric(al) on distance.Moreover, in the plane vertical with longitudinal axis 309, Td corresponds in crest 500 and tooth bottom
The depth of screw thread between 501.
The reinforcement of plug 208 can be expressed as business Ls/L in 0.25 to 0.5 scope and especially 0.28 to
In 0.32 scope.Additionally, the axial length L s of non-threaded shank 103 is improved with so that Lt is advantageous to make threaded area more than Ls
Section 204 and the axial separation of annular side surface 102, find that this is minimized for shoulder contact thread connection by analog study
At the spiral coil and in particular stress at crest 500, tooth bottom 501 and flank 502a, 502b.Correspondingly, connection connects
The risk of the failure of head is minimized, and the operation lifetime of drill string component is improved.
Threaded sections 204 are formed substantially cylindrical end section at plug 208 so that along threaded sections 204
Axial length, the diameter Dy of the screw thread between crest 500 is substantially homogeneous.Additionally, along in the end of thread 300,301
Between threaded sections 204 whole axial lengths, diameter Di is also substantially homogeneous.The subject innovation is particularly suitable for
Formed by the construction of the screw thread at plug 208 part of rig and in particular formed drill string impact (or
Hammer) component.Especially, the size (i.e. radius) dependent on elongate member, the pitch length of screw thread can 5 to 50mm scope
In.In order to optimize the screw thread for percussive drilling, for the corresponding size of component, pitch angle θ can be in 5 to 10 ° of scope
In.This construction will be relative with that can typically comprise API type screw threads, component for rotating or the exploring end of thread
Than the API types screw thread has about 1 ° of the angle of pitch greatly reduced.In some implementations, dependent on elongate member
Size (i.e. radius), the average diameter of thread (distance between crest) can be in 15 to 120mm scope.
Correspondingly, the screw thread at male form plug preferably include 0.35 to 0.55 pitch (axial distance between crest)/
The business of the average diameter of thread, wherein averagely the diameter of thread is the average value of the diameter of the male form end of thread and the female end of thread.
Male form plug of the present invention is also configured to minimize the stress concentration at transitional region 900,901,902,904,
Wherein this transitional region is axially positioned between threaded sections 204 and shoulder 207 and especially represents non-threaded shank 203
, axial component from the transition of side surface 102 at shoulder 207.According to the specific implementation, non-threaded shank 203 with
Include transitional region 900 to 904 at the connecting portion of side surface 102, the transitional region 900 to 904 is according to Curved profile straight
From (non-threaded shank 203) minimum diameter Ds increases on footpath.Additionally, by Ds, Di and Td relative size, non-threaded
The stress concentration at region around shank 203 and threaded sections 204 is further minimised.Especially, transitional region 900 to
Stress concentration at 904 must be minimized in the case where Ds is less than Dy and Ds is less than Di by as big as possible.Especially, it is maximum straight
Footpath Ds can be equal to Di-Td, and minimum diameter Ds can be equal to Di-4Td.Preferably, Ds is substantially equal to Di-2Td.
Ds and Ls relative size as described herein maximizes the axle that transitional region 900 to 904 can extend past
To distance and radial distance.Especially, and according to Fig. 9 construction, non-threaded shank 203 it is included in having at section 900
First curvature radius R1 transitional region, the first curvature radius R1 at section 900 are less than the second axial direction at section 901
Adjacent radius of curvature R 2, the second axially adjacent radius of curvature R 2 at section 901 is again less than axially adjacent at section 902
3rd radius of curvature R 3, the 3rd radius of curvature R 3 at section 902 is again less than axially adjacent 4th curvature at section 904
Radius R4.Especially, the radius R1 at section 900 is substantially equal to the half of the radius R2 at section 901；In section 901
The radius R2 at place is about the half of the radius R3 at section 902, and the radius R3 at section 902 is generally in section
/ 3rd of radius R4 at 904.As shown in Fig. 9, section 900 is near the axially position of side surface 102, area
Section 901 second positions near side surface 102, section 902 the 3rd positioned near side surface 102 and section 904 farthest away from
Side surface 102 positions.The Ds of minimum and maximized Ls correspondingly causes real between non-threaded shank 203 and shoulder 207
Now seamlessly transit.So, obtained for stress caused by bending and the stress caused by the transmission of impact ripple, plug 208
To reinforcement.
Claims (15)
1. a kind of thread connection for the impact type drill string component (100,101) for being used to drill, including：
Body, the body have the part with longitudinal axis (304), and screw thread (204) prolongs around the longitudinal axis (304)
Stretch, to form the half of nipple；
The screw thread (204), by least one spine circumferential and axially extending along the body in the form of spiral coil
(302) screw thread (204) is formed, the spiral coil has by corresponding flank (502) axially spaced crest (500) and tooth
Bottom (501), the screw thread (204) have axially spaced first (301) end of thread and second (300) end of thread；
Depth of the wherein described screw thread (204) radially at described first and/or second (300,301) end is tapered, with
Reduce in the axial direction along the circumferential paths of the screw thread (204) towards the end (300) of the screw thread (204)；
It is characterized in that：
The flank (502c) of the crest (500) of the spiral coil (504) of axial least significant end or the axial least significant end of tooth bottom (501)
Axial length is alternate with the crest (500) than the spiral coil (504) in the axial least significant end or tooth bottom (501)
The big speed of neighbouring flank (502d) at axial side reduces.
2. connection according to claim 1, wherein it is base that the formation of the body, which has the part of the screw thread (204),
This cylindricality.
3. connection according to claim 1, axially determine wherein the axial length of the adjacent teeth side (502d) is substantially equal to
Any one tooth in the flank (502a, 502b) of spiral coil (505) between the spiral coil (503,504) of the least significant end
The axial length of side.
4. the connection according to any one of preceding claims, wherein the screw thread (204) is described in the body
Outside formation is partially located in, to represent male form union end.
5. the connection according to any one of claims 1 to 3, wherein the screw thread (204) is described in the body
It is partially located in and is internally formed, represents female union end.
6. the connection according to any one of preceding claims, wherein the body includes non-threaded shank (203), institute
The circumferential paths of the depth of screw thread (204) along the screw thread (204) are stated to be decreased in the non-threaded shank (203).
7. connection according to claim 6, wherein the body includes annular side surface (102), the annular side surface
(102) it is radially projecting from an axial end of the non-threaded shank (203), and the side surface (102) transverse to or base
This is aligned perpendicular to the longitudinal axis (304).
8. the connection according to any one of preceding claims, wherein the corresponding flank (502) of the crest (500)
Include basic phase on the axial length of the screw thread (204) for the spiral coil (503,504) for not including the axial least significant end
Deng axial length.
9. the connection according to any one of preceding claims, wherein the 0.1 to 0.8 of a complete spiral coil
In scope, the depth of the screw thread (204) of the spiral coil (504) of the axial least significant end is decreased to zero.
10. the connection according to any one of preceding claims, wherein the scope is 0.2 to 0.6.
11. the connection according to any one of preceding claims, wherein the circumference of the flank (502c) of the least significant end
Path lateral is aligned in the circumferential paths of the neighbouring flank (502d).
12. the connection according to any one of preceding claims, wherein the circumference of the flank (502c) of the least significant end
Path relative to spiral coil (504) of the circumferential paths of the neighbouring flank (502d) towards the axial least significant end the tooth
Pushing up (500), either tooth bottom (501) tilt or bent in the circumferential paths of the screw thread (204) so that the most end
The axial length of the flank (502c) at end is less than the adjacent teeth in the end transitional region (700) of the screw thread (204)
The axial length of side (502d), in the end transitional region (700) of the screw thread (204), the depth of the screw thread (204)
Degree reduces.
13. the connection according to any one of preceding claims, wherein the screw thread (204) is in the crest (500)
Radial position at diameter be equal to or more than axially to the side of the screw thread the body diameter.
14. the connection according to any one of claim 1 to 11, wherein the screw thread (204) is in the crest (500)
Radial position at diameter be equal to or less than axially to the side of the screw thread (204) the body diameter.
15. a kind of impact type drill string component (100,101), including the screw thread connection according to any one of preceding claims
Connect, wherein the component (100,101) include it is following in any one：
Drilling rod；
Drilling pipe；
Shank adapter；
Drill bit.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP15168925.4 | 2015-05-22 | ||
| EP15168925.4A EP3095955A1 (en) | 2015-05-22 | 2015-05-22 | Threaded coupling end for drill string component |
| PCT/EP2016/061292 WO2016188857A1 (en) | 2015-05-22 | 2016-05-19 | Threaded coupling end for a percussion drill string component |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107636250A true CN107636250A (en) | 2018-01-26 |
| CN107636250B CN107636250B (en) | 2020-07-31 |
Family
ID=53191560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680029406.XA Active CN107636250B (en) | 2015-05-22 | 2016-05-19 | Threaded coupling end for percussive drill string components |
Country Status (13)
| Country | Link |
|---|---|
| US (1) | US10627023B2 (en) |
| EP (2) | EP3095955A1 (en) |
| CN (1) | CN107636250B (en) |
| AU (1) | AU2016266599B2 (en) |
| BR (1) | BR112017024926B1 (en) |
| CA (1) | CA2986619C (en) |
| CL (1) | CL2017002941A1 (en) |
| MX (1) | MX2017014878A (en) |
| PE (1) | PE20171774A1 (en) |
| PL (1) | PL3298228T3 (en) |
| RU (1) | RU2714405C2 (en) |
| WO (1) | WO2016188857A1 (en) |
| ZA (1) | ZA201707468B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10167680B2 (en) * | 2015-09-10 | 2019-01-01 | Hunting Energy Services, Inc. | Multi-lead quick connect threaded connection |
| US20180100356A1 (en) * | 2016-10-10 | 2018-04-12 | Padley & Venables Limited | Drill Rod |
| EP3933165A1 (en) * | 2020-06-30 | 2022-01-05 | Sandvik Mining and Construction Tools AB | Thread clearance |
| EP3971385B1 (en) * | 2020-09-17 | 2023-06-07 | Sandvik Mining and Construction Tools AB | Drill string joint design |
| PL4047179T3 (en) * | 2021-02-17 | 2024-03-04 | Sandvik Mining And Construction Tools Ab | Elliptical design for shank adapters |
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| JPS55119886A (en) * | 1979-03-07 | 1980-09-13 | Mitsubishi Metal Corp | Boring tool for rock drill |
| EP0391119B1 (en) * | 1989-04-01 | 1992-06-17 | Friedr. Ischebeck GmbH | Connecting element for a threaded joint of self-drilling injection anchors |
| US5169256A (en) * | 1990-10-26 | 1992-12-08 | Woodings Industrial Corporation | Hand connect-disconnect coupling for blast furnace tap hole drill rod assembly |
| CN1294655A (en) * | 1998-03-24 | 2001-05-09 | 桑德维克公司 | Thread joint for percussive drilling, male and female portion for forming part of joint and method for mfg. product having thread for forming part of thread joint for percussive drilling |
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| EP2845992A1 (en) * | 2013-09-09 | 2015-03-11 | Sandvik Intellectual Property AB | Drill string with bend resistant coupling |
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| US1927656A (en) * | 1931-12-23 | 1933-09-19 | Spang Chalfant & Co Inc | Pipe joint |
| US2641488A (en) * | 1947-11-12 | 1953-06-09 | United States Steel Corp | Method and means for increasing bending fatigue strength of rotary steel drill pipes |
| FR1230856A (en) * | 1959-07-21 | 1960-09-20 | American Iron & Machine Works | Connection usable in particular in the columns of rods used for the drilling of wells |
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| SE516651C2 (en) * | 1999-11-26 | 2002-02-05 | Sandvik Ab | Threaded joints for striking drilling, a trade and a female part |
| SE515194C2 (en) * | 2000-03-02 | 2001-06-25 | Sandvik Ab | Threaded joints and rock drill elements for striking drilling |
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| SE531459C2 (en) | 2006-05-17 | 2009-04-14 | Sandvik Intellectual Property | Hondel and the procedure for the manufacture of female parts |
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| EP3023575A1 (en) | 2014-11-21 | 2016-05-25 | Sandvik Intellectual Property AB | Drill string rod with shoulder |
-
2015
- 2015-05-22 EP EP15168925.4A patent/EP3095955A1/en not_active Ceased
-
2016
- 2016-05-19 MX MX2017014878A patent/MX2017014878A/en unknown
- 2016-05-19 RU RU2017144032A patent/RU2714405C2/en active
- 2016-05-19 BR BR112017024926-0A patent/BR112017024926B1/en active IP Right Grant
- 2016-05-19 CN CN201680029406.XA patent/CN107636250B/en active Active
- 2016-05-19 PE PE2017002438A patent/PE20171774A1/en unknown
- 2016-05-19 PL PL16723383.2T patent/PL3298228T3/en unknown
- 2016-05-19 WO PCT/EP2016/061292 patent/WO2016188857A1/en active Application Filing
- 2016-05-19 AU AU2016266599A patent/AU2016266599B2/en active Active
- 2016-05-19 CA CA2986619A patent/CA2986619C/en active Active
- 2016-05-19 EP EP16723383.2A patent/EP3298228B1/en active Active
- 2016-05-19 US US15/576,123 patent/US10627023B2/en active Active
-
2017
- 2017-11-03 ZA ZA2017/07468A patent/ZA201707468B/en unknown
- 2017-11-20 CL CL2017002941A patent/CL2017002941A1/en unknown
Patent Citations (6)
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|---|---|---|---|---|
| JPS55119886A (en) * | 1979-03-07 | 1980-09-13 | Mitsubishi Metal Corp | Boring tool for rock drill |
| EP0391119B1 (en) * | 1989-04-01 | 1992-06-17 | Friedr. Ischebeck GmbH | Connecting element for a threaded joint of self-drilling injection anchors |
| US5169256A (en) * | 1990-10-26 | 1992-12-08 | Woodings Industrial Corporation | Hand connect-disconnect coupling for blast furnace tap hole drill rod assembly |
| CN1294655A (en) * | 1998-03-24 | 2001-05-09 | 桑德维克公司 | Thread joint for percussive drilling, male and female portion for forming part of joint and method for mfg. product having thread for forming part of thread joint for percussive drilling |
| WO2008150207A1 (en) * | 2007-06-05 | 2008-12-11 | Sandvik Intellectual Property Ab | Rock-drilling equipment as well as female and male parts therefor |
| EP2845992A1 (en) * | 2013-09-09 | 2015-03-11 | Sandvik Intellectual Property AB | Drill string with bend resistant coupling |
Also Published As
| Publication number | Publication date |
|---|---|
| RU2714405C2 (en) | 2020-02-14 |
| EP3298228C0 (en) | 2023-07-12 |
| CN107636250B (en) | 2020-07-31 |
| US10627023B2 (en) | 2020-04-21 |
| EP3095955A1 (en) | 2016-11-23 |
| CA2986619A1 (en) | 2016-12-01 |
| BR112017024926B1 (en) | 2023-02-28 |
| CA2986619C (en) | 2023-06-13 |
| AU2016266599B2 (en) | 2020-09-10 |
| EP3298228B1 (en) | 2023-07-12 |
| CL2017002941A1 (en) | 2018-03-16 |
| ZA201707468B (en) | 2021-05-26 |
| AU2016266599A1 (en) | 2017-12-14 |
| US20180135783A1 (en) | 2018-05-17 |
| RU2017144032A (en) | 2019-06-24 |
| RU2017144032A3 (en) | 2019-08-06 |
| WO2016188857A1 (en) | 2016-12-01 |
| PE20171774A1 (en) | 2017-12-21 |
| BR112017024926A2 (en) | 2018-07-31 |
| MX2017014878A (en) | 2018-04-20 |
| EP3298228A1 (en) | 2018-03-28 |
| PL3298228T3 (en) | 2023-09-04 |
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